Police say he entered an apartment building on Nevins Street in the Boerum Hill section of Brooklyn on the morning of Nov. 15th.
He told the 33-year old resident that he was a police officer, then took her purse and fled the scene.
The woman was not hurt.
The suspect is described as 6 feet tall, thin build. wearing a grey and black sweater, black cap, blue jeans and dark shoes.
Anyone with information is asked to call Crime stoppers at 1-800-577-TIPS (8477), or submit their tips by logging onto the Crime stoppers website at http://WWW.NYPDCRIMESTOPPERS.COM .